Digi International 76000240 4 ft RJ45 to DB9 serial cable

4 ft RJ45 to DB9 serial link

This Digi International cable connects an RJ-45 male port to a 9-pin DB-9 male port over a four-foot run. It is built for engineers and technicians who need a direct serial connection to DTE equipment such as routers, switches or industrial controllers. The copper conductors carry the signal without any active conversion. The fixed length suits bench testing or permanent rack wiring.

Plug-and-play with gender check

Both ends are male, so the cable mates with female ports on the target device and the host adapter. No drivers or configuration are required once the physical connection is made. The common mistake is overlooking the DTE pinout; if the attached port is wired as DCE a null-modem adapter will be needed. Verify the port gender and signalling before installation to avoid a dead link.

Steady signal over the full length

The copper conductors maintain a clean serial signal across the entire four-foot span during continuous data streams. There is no active circuitry to overheat or introduce latency under sustained load. Performance remains consistent whether the link runs a brief configuration session or a long-term monitoring job. The passive design means reliability depends only on the quality of the mating connectors.